Use <footer> in place of <div>

[nisbet-hubbard]

This is a low-hanging fruit. Semantic tags improve accessibility, and there’s no cosmetic change involved in this case.

A remaining issue is the duplicate <h1> tags: one from site name, and a second one from first-level heading:

    <div class="container-lg px-3 my-5 markdown-body">
      
      <h1><a href="https://pages-themes.github.io/primer/">Jekyll Theme Primer</a></h1>
      

      <p>Text can be <strong>bold</strong>, <em>italic</em>, or <del>strikethrough</del>.</p>

<p><a href="./another-page.html">Link to another page</a>.</p>

<p>There should be whitespace between paragraphs.</p>

<p>There should be whitespace between paragraphs. We recommend including a README, or a file with information about your project.</p>

<h1 id="header-1">Header 1</h1>

A good solution would be to enclose the first inside a <header> or <nav>, and {{ content }} inside a <main>, since it’s idiomatic for different sections to get their own <h1>.

Example from other themes: cotes2020/jekyll-theme-chirpy#1207.

[welcome]

Welcome! Congrats on your first pull request to the Primer theme. If you haven't already, please be sure to check out the contributing guidelines.